This patch introduce clock property for MCLK master freq control. Driver will set rate of MCLK master if set_sysclk is called and changing sysclk by board driver.
Signed-off-by: Katsuhiro Suzuki katsuhiro@katsuster.net
---
Changes from v1: - Output logs if clock error is found - Disable and unprepare mclk when remove this driver --- sound/soc/codecs/es8316.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+)
diff --git a/sound/soc/codecs/es8316.c b/sound/soc/codecs/es8316.c index 229808fa627c..ab41f2c056bd 100644 --- a/sound/soc/codecs/es8316.c +++ b/sound/soc/codecs/es8316.c @@ -9,6 +9,7 @@
#include <linux/module.h> #include <linux/acpi.h> +#include <linux/clk.h> #include <linux/delay.h> #include <linux/i2c.h> #include <linux/mod_devicetable.h> @@ -33,6 +34,7 @@ static const unsigned int supported_mclk_lrck_ratios[] = {
struct es8316_priv { struct mutex lock; + struct clk *mclk; struct regmap *regmap; struct snd_soc_component *component; struct snd_soc_jack *jack; @@ -363,12 +365,19 @@ static int es8316_set_dai_sysclk(struct snd_soc_dai *codec_dai, { struct snd_soc_component *component = codec_dai->component; struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component); + int ret;
es8316->sysclk = freq;
if (freq == 0) return 0;
+ if (es8316->mclk) { + ret = clk_set_rate(es8316->mclk, freq); + if (ret) + return ret; + } + return 0; }
@@ -693,9 +702,26 @@ static int es8316_set_jack(struct snd_soc_component *component, static int es8316_probe(struct snd_soc_component *component) { struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component); + int ret;
es8316->component = component;
+ es8316->mclk = devm_clk_get(component->dev, "mclk"); + if (PTR_ERR(es8316->mclk) == -EPROBE_DEFER) + return -EPROBE_DEFER; + if (IS_ERR(es8316->mclk)) { + dev_err(component->dev, "clock is invalid, ignored\n"); + es8316->mclk = NULL; + } + + if (es8316->mclk) { + ret = clk_prepare_enable(es8316->mclk); + if (ret) { + dev_err(component->dev, "unable to enable clock\n"); + return ret; + } + } + /* Reset codec and enable current state machine */ snd_soc_component_write(component, ES8316_RESET, 0x3f); usleep_range(5000, 5500); @@ -718,8 +744,17 @@ static int es8316_probe(struct snd_soc_component *component) return 0; }
+static void es8316_remove(struct snd_soc_component *component) +{ + struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component); + + if (es8316->mclk) + clk_disable_unprepare(es8316->mclk); +} + static const struct snd_soc_component_driver soc_component_dev_es8316 = { .probe = es8316_probe, + .remove = es8316_remove, .set_jack = es8316_set_jack, .controls = es8316_snd_controls, .num_controls = ARRAY_SIZE(es8316_snd_controls),